The same vascular surgeon diagnosed both conditions. He is of a very conservative mindset though and doesn't recommend treatment for either at this point, even though my circulation is now compromised in both arms and both legs. I am to let him know if either arm or leg balloons in size (thus indicating a clot) but other than that just keep on as I am. I am in the process of getting second opinions about the TOS and will discuss the MTS as well. Unfortunately, since both conditions are rare a vascular surgeon who specializes in one almost certainly wouldn't specialize in the other as well.